diff --git a/libavformat/boadec.c b/libavformat/boadec.c
index 495090c485..74a6ceecb1 100644
--- a/libavformat/boadec.c
+++ b/libavformat/boadec.c
@@ -54,12 +54,12 @@ static int read_header(AVFormatContext *s)
     avio_rl32(s->pb);
     st->codecpar->sample_rate = avio_rl32(s->pb);
     st->codecpar->channels    = avio_rl32(s->pb);
-    if (st->codecpar->channels > FF_SANE_NB_CHANNELS)
+    if (st->codecpar->channels > FF_SANE_NB_CHANNELS || st->codecpar->channels <= 0)
         return AVERROR(ENOSYS);
     s->internal->data_offset = avio_rl32(s->pb);
     avio_r8(s->pb);
     st->codecpar->block_align = avio_rl32(s->pb);
-    if (st->codecpar->block_align > INT_MAX / FF_SANE_NB_CHANNELS)
+    if (st->codecpar->block_align > INT_MAX / FF_SANE_NB_CHANNELS || st->codecpar->block_align <= 0)
         return AVERROR_INVALIDDATA;
     st->codecpar->block_align *= st->codecpar->channels;